Butter tub setting up machine



BUTTER TUB SETTING UP MACHINE Filed April 22, 1930 May 9, 1933.

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" zze v R. L. HINES ET AL '7 Sheets-Sheet 1 g I a a a a a a n n a.

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BUTTER TUB SETTING UP MACHINE F iled April 22, 19:0 .7 Sheets-Sheet 2 RL,Hinea Jlfilum Qwoenlou y 9, 1933- R. L. HlNES ET AL 1,903,353

BUTTER TUB SETTING UP MACHINE Filed April 22, 1950 7 Sheets-Sheet 3gwventoq y 1933- R. L. HINES ET AL 8,

BUTTER TUB SETTING UP MACHINE Filed April 22, 1930 7 Sheets-Sheet 4ooooo ooooocoq m @0000 ouooooa x 0000 oo0o oo "3 jwventoq R.L Hi/1e5,1452M? y 1933- R. L. HI NES ET AL 1,908,353

BUTTER TUB SETTING UP MACHINE Filed April 22, 1930 '7 Sheets-Sheet 5 ooaogoooooo Ill gwuwntoq ZZZ/45 1:7165, 771/, I Pllfilum y 9, 1933- R. L.HINES ET AL 1,908,353

BUTTER TUB SETTING UP MACHINE Filed April 22, 1950 7 Sheets-Sheet 6 k 76 L 7 manic,

B.L.H i116; cli/ lu m Patented May 9, 1933 UNITED STATE ASSIGNORS ToWisconsin BUTTER Tu POB-ATIOI'T or WISCONSIN s PATENT OFFICE I RAYMONDL.HINES, JOHN A. BLUM AND PAUL 1.. BLUM, or MARSHFiELD, Wiscons n} B 00.,or MARSHFIELD, WISCONSIN, A con;

BUTTER TUB SETTING UP Macrame Application filed April 22,

This invention relates to machines .for

forming tubs and particularly butter tubs and the general object of theinvention is to provide a machine of this character which includes atable upon which a set of staves may be laid out for a tub, a form uponwhich the staves are disposed and carried, means for shifting the formto carry the set of staves now disposed around the form into a pair oftruss rings, means for withdrawing the form and then discharging thestaves trussed by the truss rings out of the setting up machine so thatthe tub may be crozed and otherwise finished. V

A further object is to provide means whereby a setof staves may be laidout upon a table and the last set of the series may be cut or sawed upona level which will be a true radius of the circle of the tub so thatwhen the several staves are set together to form the tub, every jointwill fit perfectly.

A further object is to provide in a structure of this character, a tableupon which the bundle of staves is laid out and cut as previously'stated and a form consisting of a hollow perforated cone upon which thestaves are swept by the operator, this cone being connected to meanswhereby the air may be continuously withdrawn from the interior of thecone so that the staves shall be held upon the cone while the cone orform is shifted into a position to carry the arranged staves within thetruss rings, the cone then being automatically withdrawn from the staveswithin the truss rings and the tub with its truss rings allowed to rollout of the machine.

A further object is to provide means for shifting the staveslongitudinally into correct position upon the form so as to bringtheends of the staves in a single vertical plane.

Another object is to provide means whereby a pair of truss rings may befed autoy matically into the path of the reciprocating form and thestaves assembled thereon prior to each forward movement of the formcarrying the staves and provide means whereby the truss rings may bedisposed upon an elevator and carried to the magazines or feedingelements above referred to.

1930. Serial no; 446,328.

hoops and racks; 1

Figure 6 is a fragmentary plan view of the automatic stop andalliedparts;

Figure 7 is an end elevation of the structure shown in Figure 6;

Figure 8 is a vertical sectional View through one of the racks;

Figure 9 is a fragmentary enlarged elevation of one end of themachineshowing the stops for controlling the feed of the truss and popps andthe discharge of the completed Figure 10 is an end elevation partly insection on an enlarged scale of part of the structure shown in Figure 7Figure 11 is asection on the line 1l11 of;

Figure 10;

Figure 12 is a section on the line 12 -12 ofFigurell; Figure 12 is afragmentary perspective View of the clutch key;

Figure 13 is a section on the line 13-13 of Figure 1;

Figure 14: is a fragmentary sectionthrougk one side rail and through theexhaust pipe and showlngthe thrust plate in elevation Figure 15 is afragmentary elevation of the second section of the table showing the Istop actuating mechanism in elevation;

Referring tothese drawings, 10 designates the longitudinally extendingguides or rails which are operatively mounted upon legs 11 which formthe frame of the machine, this frame carrying the table 12, i

Supported upon supporting legs 13 is'an arcuate assembling table formedof two sec'-' tions 14 and 15. At the rear ends of'the sec, I

Other objects will appear in the course.

the truss i tions 14 and 15 are disposed the curved form boards 16 tokeep the staves in position. The section 14 as will be seen from Figure13 is higher than the section 15 and extending downward from the surfaceof the section 14 to the upper surface of the section 15 is a downwardlycurved portion 17 extending entirely across the sections 14 and 15. This.curved portion 17 has its butt end even with the end of the section 15which confronts the section 14. A space is left between the sections 14and 15 through which the circular saw 18 operates, this saw beingmounted upon a swinging arm 19 supported on the member 13 forming partof the frame 13 supporting a motor 20, which motor is operativelyconnected to the saw mandrel 21 as by means of a balt or any othersuitable mechanism to this en An adjustable counter-weight 22 acts to return the saw to a retracted position. This saw is operated constantly.The staves which are used to make tubs come to the operator in bundles.Each bundle constitutes approximately one set, that is suflicient forone spread on the form board 14 where the staves are inspected forquality by the person operating the saw. If there are any off-gradestaves in the set, they are taken out and put into a stave box 23 and agood staveput in place. The set of staves is now swept or slid fromsection 14 on to section 15 until the first stave rests againstadjustable stops 24 projecting up through slots in the extremity ofsection 15. v

The means for operating these stops will be later stated. The last staveof the series will now extend somewhat over thesaw line or space betweenthe sections 14 and 15, the last stave resting upon the curved portion17. The operator then holds the stave to be cut firmly down on thecurved portion 17 with his right hand while he draws the saw through thestaves with his left hand, thus cutting the set on form board 15 toexact size. The downwardincline or curvature of the convexly curvedportion 17 acts to support the stave at such an inclination to thehorizontal that the saw 18 will cut the edge of the stave on the properbevel. While the saw operator gets the next set spread out on the tablesection 14, the machine operator releases the stops 24 and sweeps orslides the entire set on to the form. The stops 24 as illustrated inFigure 15, have upwardly and outwardly curved-portions projecting upwardthrough the slots in the form board 15 and from a point just above thisform board 15 extend straight downward and then laterally and carry theears 25. These ears are mounted upon a rock shaft 26 having an armconnected 10 are mounted upon the frame of the machine in any suitablemanner and constitute carriage guides. These guides are provided withlongitudinally extending grooves 30 formed upon the inside faces of therails 10. Operating in these guide grooves 30 is a cross head 31. Thiscross head carries upon it the rod 32 which in turn engages with the airexhaust elbow 33. This elbow is angular in form and the upper end of theelbow is designed to be connected by a flexible trunk or like means toan air exhauster of any suitable character such as the cyclone in theplant which acts to draw the dust from the 7 machine.

This cyclone creates a suction or partial vacuum in the elbow 33. Therear end of the elbow projects through a head 34 of a frustoconicalformer 35 of perforated sheet metal. The other end of this formerissupported by means of a head 36 having a hub 37 with which theextremity of the rod 32 is rotatably engaged. The head 34 is providedwith the radial inwardly offset spokes 38 constituting a spider, the hub39 of which is rotatably mounted upon the rod 32. The hub 37 is alsorotatable upon therod 32, but is held in place for longitudinal movementwith the rod by means of the screw 40. The head 34 is annular in form soas to embrace the rear end of the elbow 33 and the inner edge of thisannular head is grooved for the reception of an oil soaked felt washer41 which con tacts with and has practically air-tight engagement withthe rear end of the elbow The elbow 33 is provided with sleeves 42through which the'rod 32 passes, each sleeve being held to the rod 32 bya set screw 43 or like means. The elbow is also provided with thedownwardly extending ears 44 wlaereby it may be connected to anoperating ro Disposed to surround the rearwardly extending portion ofthe elbow 33 is a thrust plate 45. This thrust platehas' an exteriordiameter slightly larger than theadjacent end of the truncated form 35.The elbow has attached to it the longitudinally extending channel-shapedguides 46 (see Fig. 14) and the thrust plate has formed therewith thelaterally disposed portions 47 having tongues engaging in said guides 46and having laterally projecting tongues engaging in the guide grooves30. Thus the thrust plate is longitudinally guided upon the rails 10 andalso with reference to the elbow, these grooves and tongues acting tohold the elbow in proper position. i

The thrust plate ismounted upon lateral upon these rods by set screws orlike formed with laterally extending yoke link 56.

able bearing heads 67 to the rods 48 which extend forward and at theirforward ends pass loosely through the cross head 31 and thus havesliding engagement in this cross head. The thrust plat is held means.Springs 49 each attached at one end to the cross h ad 31 at the otherend are operatively connected to the thrust plate acting to urge thethrust plate toward the cross head.

Mour'ited upon the frame of the machine at the front thereof is a lever50 angular in form shown in Figure and its lower end slotted as at 51the reception of a pivot pin 52. The upper end of this lever is formedto constitute bifurcations or forks at each end, which forks "age therods 48 and are pinned thereto by pi; This le er is slottec. at 55 anddisposed in this slot is a link 56 which at its rear end is pivoted tothe cars 44 and at i forward end is srotted as at 57 to receive a pin 58e ending through the walls of the slot 55. Thus the lever 50 has slightmovement inwardly relative to The lever is formed with a has. just belowthe slot having a pivot pin 60 extending therethrough to which theforward end of a reciprocating rod 61 is operatively connected. Thisconnecting rod passes through a U-shapcd voke 62 which yoke is pivotedon the pivot pin 60 and the connecting rod carries the nuts 63 and acoiled compression spring 6% is disposed between the end of the yoke 62and these nuts so as to I constitute a cushionin s rin Disposed belowthe table 12 and at the rear of the machine is a transversely extendingshaft 65 carrying upon it a crank arm 66 which is operatively connectedthrough suitconnecting rod 61. Mounted loosely upon this shaft 65 is agear wheel 68 which. meshes with a driving pinion 69 mounted upon ashaft 70 driven from any suit-able source of power. Generally speaking,a clutch is disposed between the shaft 65 and the gear wheel 68 whichclutch is adapted to be operated by means of a pedal so that when thispedal is depressed and the clutch is thrown in the shaft 65 will makeone complete revolution and then the clutch will be automatically thrownout. This complete revolution of the shaft 65 and of the crank arm 66carries the lever 50 rearward and the first action is to shift thecomplete carriage as one unit rearward through about half of itscomplete travel during which time pin 58 is traveling through the slot57 in link 56. At this point the parts 31, 32, 33 and 35 which areconnected to link 56 begin to retreat toward thrust plate 45, break-'plate forces the staves tightly in position between the truss hooprings and then the reverse stroke of'the crank arm66 carries the formout from within the formed staves and all the parts are brought back tothe initial position shown in Figure 4.

In order to providemeans for intermittently giving one rotation to theshaft 65 and to the crank arm 66, I mount the gear wheel 68 loosely upona clutch gear sleeve 71. This sleeve is keyed upon the shaft 65 and atone end is provided with a head 72. This.

engage with a recess 78 formed in the inner. margin of the gear wheel'68. When the arm' 76 is lifted upward against the action of the spring77, however, the key will be turned into such position that it no longerprojects into the path of movement of the gear wheel 68 and at this timethe gear wheel 68 rotates freely upon the clutch sleeve71.

For the purpose of automatically turning the key against the actionofthe spring 77 into a position where it will engage the gear wheel 68with the clutch sleeve, we provide a stop 7 9. frame of the machine andis urged into a position against a stop 81 by means of a contractilespring 82. The stop 79 is connected.

by a llIlJ. 83 to a lever 84 pivoted upon the frame of the machine andthe other end of this lever is connected by a connecting rod 85 to onearm 86 of a pedal 87. When this pedal is depressed, it withdraws thestop 79 from below the arm 7 6, thus permitting the spring 77 to shiftthe arm 76 into a direction to carry the key into interlockingengagement between the clutch sleeve and the gear wheel 68 and tien thegear wheel 68 and the shaft 65 will rotate together through onerevolution. As soon as the operator releases the pedal 87, the spring 82will returnthe stop arm 79 to its clutch engaging position, and as theclutch sleeve completes its rotation, the arm 76 will engage the stoparm 79 and will be'lifted against the force of the spring 77 thuswithdrawing the clutch and permitting the gear staves are disposed uponthe form 35, the machine operator depresses the pedal 87. This causesthe retraction of the connecting rod 61 and causes the lever 50 to moverearward carrying with it the thrust plate l5 and the cone 35. Theinitial movement is given to the thrust plate which moves against thestaves, evening the staves up, then the motion This stop is pivoted at001113011 the- I is communicated to the rod 32, the elbow 33 and theform and the staves arranged upon the form are thrust into the temporaryhoops with a force suihcient to jam the staves within the hoops and thenthe lever moves back again to its initial position and the form 35,thrust plate and the elbow are withdrawn and brought to their initialpositions.

It will be understood, of course, that the cone heads 36 and 34 rot-atefreely upon the shaft 32 and upon the elbow 33. Ball bearings may beused to support these heads 34 and 36 if desired.

It is to be understood that when the staves S are placed upon the form35, they project about one and one-half inches over the end of the coneor form. Then the lever 50 moves the thrust plate rearward, the link 56which controls the movement of the cone travels with it at a slowerrate. This difierence in the rate of motion of the plate and coneprevents the cone from sticking in the tub when the latter is forcedinto the truss rings carried by the truss ring racks now to bedescribed. The thrust plate 45 does not under any circumstances,however, strike the conical form 35, but merely strikes the ends of thestaves. Inasmuch as the elbow 33 has its sides provided with channelscorresponding with inwardly projecting tongues on the thrust plate, thisdifference in length of travel is permitted.

For the purpose of stopping the shaft when it has made one revolution,we mount upon the shaft the brake drum 88 which is keyed on this shaft.This brake drum is surrounded by two brake shoes 89 and 90, the lowerends of these brake shoes being connected by means of the bolt 91 andthe upper ends by a bolt and a spring 92 which urges the two sectionstoward each other. The brake shoe or section 90 of the brake band has alateral section 93 engaged with the pivot pin 94 projecting from abracket 95 mounted upon the frame of the machine so as to thus hold thebrake from rotating with the brake drum. The instant that the power iscut off from the shaft 65, the friction brake formed of the parts 89 and90 will prevent any further movement of the shaft and thus the shaft isstopped when it has been given one complete revolution. The pivot pin 94carries upon it the tripping lever 96 and the I brake drum 88 isprovided with an outwardly projecting pin 97 carrying a roller 98 whichoperates agalnst the free end of this lever, once for every revolutionof the brake drum.

This lever 96 is connected by a connecting rod 99 to an arm 100projecting from a rock shaft 101 mounted in suitable bearings upon theframe of the machine.

As illustrated in Figure 9, the frame of the machine is extended upwardabove this rock shaft 101 so as to form a cross bar 102 above the sh aft101. Mounted upon the shaft 101 are the truss hoop trips 103 and 104,the trip 103 carrying an outwardly. projecting curved finger 1 05. Thetrip 104 is swung by a link 106 connected. to an arm 107 (see Fig. 8)mounted upon the rack shaft 101 and the outer end of this trip 104 ispivotally mounted between two ears 108 on a transverse pivot pm.

A spring 109 engaging with the arm 100 acts to rotate the shaft 101 in adirection to lift the finger 105 and simultaneously depress the innerend of the member 104 all for a purpose as will now appear.

Mounted upon the table 12 are two spaced racks designated generally 110and 111 designed to receive the truss hoops A and guide these trusshoops into such position that the cone shaped form and the stavesassembled thereon may be forced into these temporary hoops A. Each ofthe racks consists of 0p posed sections, each section having anapproximately semi-circular periphery defining the outer wall 112 ofeach rack. Each section has the side walls 113. Each side wall 113 atits lower end is cut away at 114 to receive the tub mounted upon theconeshaped form The lower end of each rack rests upon the table 12 andextends out to each edge of this table. The inner wall of the rack isformed by the angularly related walls 115 (see Figure 8) connected attheir inner ends by a curved portion 115a. Thus the upper portion of thewall 115 forms the bottom of the upper leg of the rack while the lowerportion of the wall 115 forms the top of the lower leg of the rack. Theside walls are provided with the angle irons 116 and are also braced bythe downwardly and laterally extending webs 117. The angle irons 116 areconnected to the transversely extending bar 102. The hoops which are fedinto the upper legs of the racks roll down the racksinto the lower legsthereof, as shown in Figure 8 and each forwardmost hoop is held againstfurther downward movement and in alinement with a cut-away portion at 14by the stops 104. These stops 104 may be raised upward to release thecompleted tub and permit its discharge downward upon the tracks 118 butwhen the stops 104 are thus raised, a finger 105 is depressed to preventthe complete discharge of the completed tub but permit the tub to passthe stops 104. Then as the finger 105 is raised, the stops 104. will belowered behind the completed tub and will engage the next pair of hoops.Ra ls 118 lead from the lower ends of the racks, these rails beingchannel-shaped to accommodate the Y hoops and permit the hooped tub toroll on down the tracks and be discharged.

Preferably means are used whereby the hoops may be automaticallyreturned to the racks after the tubs have been crozed and permanenthoops put on. We do not wish to be limited, however, to any specificmeans for thispurpose, the means simply consist ing in gravity conveyorC leading to the upper legs of the racks.

This machine is driven by means of an electric motor 119 mounted uponthe frame of the machine or mounted in any other suitable position, theshaft of which motor carries a pulley 119 (see Figure 3). This pulley isbelted to a pulley mounted upon a worm shaft 121. The worm on this shaftengages a worm wheel (not shown) mounted upon the shaft which operatesthe pinion 69. Any other means for transmitting power may be used,however.

It will be seen that in the operation of this machine, and assuming thatthe parts are in the position shown in Figure 4, the set ofstaves asbefore stated is spread out on the table section 14, where it isinspected, etc. Theset of staves is now shifted from the section 14 onto the section 15 so that the forwardmost stave is against the stops 24.The operator, holding the last stave of the series, then shifts the saw18 lengthwise of this stave, cutting the stave so that the set will nowfit accurately around the form 35. l Vhile the saw operator gets thenext set spread on the table section 14, the machine operator pushesdown the lever 28 which lowers the stops 24, these stops forming abridge over the section 15 on to the cone 35. While the form board stopsare held in this position with the left hand, the machine operator withhis right hand grasps the set at the extreme left and with a sweeping orbrushing motion slides the entire set on to cone 35. As the first staveof the series reaches the cone, it will be held more or less firmly uponthe cone by reason of the partial vacuum formed in the interior of thecone and as the staves are pushed to the cone, the force exerted by theoperator in pushing the staves on to the cone, will cause the cone torotate, the successive staves being held to the cone by the said partialvacuum. After this initial movement of the cone,the cone will continueto turn to allow the rest of the staves to follow right on around, thesestaves being held in place by a vacuum.

Attention is particularlycalled to the factthat the perforations 35 aredisposed very closely adjacent each other over the entire cone anduniformly disposed over this cone and furthermore that theseperforations are disposed in inclined lines longitudinally of the cone.This has been found to be necessary for the assembling and holding ofthe relatively narrow staves of a bucket. As amatter of fact, the conein actual use is perforated with about 350 holes of one-quarter inchdiameter and the arrangement of the holes is such that no two holes aredirectly in line along the longitudinal lines of the form. This permitsa stave of extreme narrowness to be held firmly to the form. We havefound in actual practice that in a form of large area, relatively fewholes will not possibly accomplish the desired results since a narrowstave might possibly be disposed between two of the holes or between twoof p the holes in the former that really controls the vacuum within theformer.

Th staves having been placed upon the cone 35 and held in place by thepartial vacuum in the interior, the next step in the operation of thismachine is to force the tub into the temporary truss hoops. Thisissecured by operating the treadle 87 which clutches the shaft 65 to thegear 68 which is continually being turned by the motor and the rotationof the shaft 65 as before stated causes the thrust plate 45, perforatedcone 35 carrying th staves, shaft 32 and elbow 33 and all partscomposing the carriage to move together as one unit throughapproximately half of the complete travel, during which time the pin 58is moving through the slot 57 in link 56. At this point, the carriagecarrying the staves has entered the truss hoop and is progressing towardits objective, the pin 58 having reached the extremity of slot 57 inlink 56 and being constrained for further movement and this draws theelbow 33, shaft 32 and cone 35 which carries the staves (all of whichare connectedas one unit to link 56) toward thrust plate 45. As themovement continues the ends of the staves are brought firmly against thethrust plate and thecone 35 is drawn back until the vacuum is broken. Atthis point, of course, the carriage has reached the end of its travel,the

thrust plate 45 has set the staves firmly with in the truss hoop and allparts are ready to return to the starting point. Of course, the operatorreleases the pedal 87 immediately that themachine is started and,therefore, the cone with the staves is moved into the truss rings andthe thrust platejams the staves firmly into the truss rings and uponthe-return movement of the crank 66, completing the revolution of theshaft 65, the parts are returned to their normal position. As soon asone complete revolution has been made the rock shaft 101 is operatedwhich releases the partially completed tub with its temporary hoops, andthese roll out of the machine down the track provided thereforwhile thenext set of rings move downward in the racks to their receivingpositions in the lower legs of the racks, ready to receive a new tub.The elbow 33 may be connected to the dust collecting system, that is, tothe cyclone in any suitable manner, which will afford sufiicientflexibility to the connection as the elbow 33 is shifted.

It is to be particularly noted that the slotted link 56 is ofconsiderable importance as this acts to cause the cone 35 to be drawnback toward the thrust plate 45 while the thrust'plate is forcing thestaves into the *truss rings, thereby preventing the cone from stickinginto the trussed tub.

While we do not wish to be limited to this, attention is also called tothe fact that preferably the perforations in the cone 35 run ninglengthwise of the cone will be on a slightly spiral line and under thesecircum stances there will always be enough perforations to cause evennarrow strives to stay on the cone. 7

It will be understood, of course, that any suitable means such as footpower, steam power, compressed air, etc, may be used for actuating thecarriage or otherwise driving the machine. Our machine greatlysimplifies the process of laying out, setting up and trussing andcontrolling the size, form and shape of butter tubs and other objects ofsimilar nature. The machine can be used in the manufacture of buttertubs, lard tubs, pails, fish kits, firkins or any circular package usingstaves or similar material, either tongued and grooved,'saw ointed, orsmooth jointed in their construction. In the past, tubs have beenmanufactured by laying up the staves by hand which staves are setupright in a ring held by suitable supports. The last stave had to becarefully selected so as'to be of the right width to fit the circle andthis takes considerable time and makes the tub uneven and of unequalsize. This is entirely eliminated by our machine and this machine alsoeliminates rolling the tub after it is set up as the tub comes outsmooth whereas where the tub is set up by hand, the tub is uneven andhas to be rolled between two rollers at a tremendous pressure in orderto even them up.

In our machine, the staves are kept close and even to the drum byvacuum. Conse quently when they are trussed in the rings, they remaineven and smooth. I

Our machine will make a tub or other package out of poorly jointedmaterial as t e cut-off saw is so suspended and the form board is soshaped that it gives the correct taper to the last stave of the seriesso that a perfect tub is formed. This saves the necessity of rejoiningor sorting out the staves and saves the rehandling of staves and layingup as the staves do not have to be picked out and replaced by others toget the right taperor the right number of staves in the tub,Furthermore, this machine permits any number of staves to be used for atub, whereas by the old methods, each bundle of staves had to haveexactly the same number for each tub. Another advantage of our inventionis that it saves material inasmuch as the part cut oil may be used inthe next set having been jointed properly by the cut-off saw, whereas bythe old process, a poorly jointed stave was thrown away as waste. Theair suction applied to the handling of the staves on the drum also actsas a cleaner or collectorfor the dust on the st'aves, thereby producinga more sanitary package for butter and other products. a y e In ourmachine, there is no need for placing the tub in a truss-er to truss thetub tight in the rings so that it can be crozed and trimmed as this isaccomplished by forcing the tub bodily into the truss rings, between aform and the truss rings and then withdrawing the form. In ourconstruction furthermore the tub is trussecl but the supporting cone orform is prevented from being damaged or sticking in the tub. With ourmachine, an absolutely uniform tub is produced which is very necessaryto the packing of butter, one tub being exactly the same size asanother, whereas with the processes now in use, one tub may vary incapacity from another tub from one to three pounds, causing extra workin the Creamery or other packing plant and causing occasionally asubstantial loss of butter.

It will be seen that in our construction both units which areconstituted one by the form 35, the shaft 32 and the elbow 33 and theother unit which consists of the thrust plate 45 and the rods 48 travelat different speeds. Both units are held in position by springs 49 andif it were not for connecting link 56, both units would travel forwardand back as one unit, the length of travel by the complete unit beinggoverned by the throw of the crank 66 and the connecting lever 50. Owingto the difference in the length of the lever between the pivots 52, 60and 54, the length of travel of the complete cross head is greater thanthe throw of the crank 66. Now by connecting the first unit, that is,the form 35 and exhaust pipe to the lever 50 at a point nearer the pivotthan to the pivot 54, we get a shorter stroke at pivotal connection 58to cause the radius between 52 and 58 to be shorter than between 52 and54.

Starting with the machine in the position shown in Figure 4, as thecomplete cross head starts to move forward, the two units move in unisonuntil the slack in link 56 provided for by slot 57 is taken up. Thisdifference is taken up at a point approximately half way between the twoextremes of movement of the cross head. From this point on, the firstunit will travel slower than the second unit or thrust plate, owing tothe fact that the arch of'the circle described by pivot 58 is shorterthan that described by pivot 54. As the unit starts to return to itsforward position, the springs 49 will urge the first unit consisting ofthe form 35 and the pipe 38 toward the thrust plate or toward the rearend ofthe machine until the slack in link 56 is again taken up, the twounits traveling at the same speed. At this point, the first unit ispushed away from the second unit or thrust plate 45 in the same manneras in its forward motion, by reason of the differential motion of thetwo pivots 58 and 54. It is to be understood, of course, that the pipe 3which is connected to the form shown in Figure i is a relatively strongpipe ordinarily made of 5% inch sheet iron electrically'welded together,forming a strong and rigid unit. The sleeves 43 are welded into the pipeand the pipe is secured to the shaft 32 by means of set screws, thuspro-- viding an amply rigid construction for the slight pressurerequired to draw the form 35 from the tub.

While we have illustrated certain details of construction andarrangements of parts which we have found to be particularly valuable,we do not wish to be limited to such detailed construction orarrangement as minor details might be varied in many ways withoutdeparting from the spirit of the invention as defined in the appendedclaims.

We claim 1. In a tub setting machine, a table formed of twolongitudinally curved sections, upon which a set res may he laid, thefirst section being higher than the succeeding section, pivoted stopsmounted at the forward end of the second section normally extendingstraight upward hut rota hie into positi-on below the table suppo thestates as they leave the table, manually operable means whereby r. stopsmay be lowered, a saw operating across the table and radial to the curvethereof, th distance between said saw and said stops being equal to thecircumference of a completed tub the second section having at. the endadjacent said saw a convexly curved portion.

2. In a tub setting up machin a hollow stave su giportingr freelyrotatable perforated form circular in cross section perforated over itsentire surface, the perforations being relatively close to each other,means for continually exhausting the air from the interior of the formand a table discharging staves upon said form.

3. In a tub setting up machine, a hollow stave supportingfrusto--conical perforated form, means for axially reciprocat ,ing saidform, means for continually exhausting air from the interior of theform, and means for supporting truss rings in the path movement of andconcentric to 'd f supporting a pair of truss in spa ed relation to eachother and with their axes in alinement, and a stave receiving ft maxially reciprocable to carry the staves supported thereon into saidtruss rings and then withdraw the form.

5. In a tub setting up machine, means for eporting a pair of truss ringsin spaced rezation to each other and with their axes coincident, afrusto-conical form adapted to support the staves of a tub thereon,means for reciprocating said form to carry the stares on the form intosaid truss rings, a thrust plate disposed rearward of the form, andmeans for reciprocatingsaid thrust plate i epenzilently of the form tohold the staves Wlbll their ends evened up when the form is carried homewithin the truss rings.

5. in tub setting-up machine, a hollow, o-conical perforated stavesupporting TOllfl mounted for reciprocating, means for co: tinuallyexhausting air from said form to hold said staves thereon, means forsupporting a p .urality of truss rings in the path of mover-entof saidform and concentric thereto, means for reciprocating said form into aposition within the truss rings and Wing form therefrom and a staveaiding thrust plate mounted rearward of '5. In a tub setting up machine,a pair of ss ring supporting racks disposed in relation to each otherandopen on is, means for supporting the staves of a tub in assembledrelation and forcing i' a es through said racks and into the se ilugScarried thereby, and means for detaining the assembled staves and trussrin e in the racks and operable to permit tl discharge therefrom.

In a tub setting up machine, a pair of hollow truss ring racks havingalined stave receiving og r ening's, each rack being open on one edge, ahollow stave supporting perforated frusto-conical form mounted forreiprocation into and out of said racks and is rings supported. therein,means for coninuously exhausting air from the interior of "e form tohold the staves thereon, power rated means for reciprocating said form,manually controlled means for connecting e power operated means to theform reprocatin means and means for automatiliV l c riage, hollow stavesupporting frustoconical perforated form mounted upon said carriage,means for continually exhausting air from the interior of the form, anannular thrust plate mounted rearward of the form- ,rge of a completedtub, a reciprocating and adapted to engage against the ends of thestaves carried on the form, a lever operatively connected to thecarriage, power operated means normally disconnected from but adapted tooscillate said lever, manually operable means for connecting the poweroperated means to said lever, means acting automatically to disconnectthe power operated means from the lever after the lever has made onecomplete oscillation to carry the form and staves into the racks andwithdraw the form therefrom, means to detain the completed tub in therack and operated automatically to permit its discharge therefrom, andan operative connection from said lever to the thrust plate causing thethrust plate to reciprocate under the action of said lever after theform has shifted under the action of the lever.

10. In a tub setting-up machine, a pair of truss'ring supporting racks,open on their sides and ends and each open at one end, a reciprocatingcarriage, guide rails upon which said carriage reciprocates, a hollowstave supporting, frusto-conical perforated form mounted upon thecarriage for reciprocating therewith and adapted when shifted forward toenter said racks and be disposed within the rings carried thereby, anexhznist pipe extending centrally from the rear end of said form andadapted to be connected to means whereby air may be continuallyexhausted from the interior of the form, an annular thrust platesurrounding said pipe and mounted for reciprocation relative thereto, a.lever operatively connected to the pipe and thus to the form, meansconnecting said lever to the thrust plate, the first and last namedconnecting means permitting a dif ferential motion between the thrustplate and the form, means for reciprocating said lever including a crankshaft having its crank operatively engaged with the lever, a gear loosethereon and driven from the source of power, manually operable means forengaging said gear with the crank shaft, and means acting automaticallyto release the connection of the gear when the crank shaft has made onecomplete rotation andthe carriage one complete reciprocation.

11. In a tub setting up machine, a hollow stave supporting perforatedfrusto-conical form, a rod upon which said form is mounted for rotationand with which the form is adapted to reciprocate, means for supportinga pair of truss rings in axial alinement with each other in the path ofmovement of said form, means for continuously exhausting the air fromsaid form including an exhaust pipe entering the rear end of the formand with which the form has rotative airtight engagement, a thrust platemounted upon the pipe for reciprocation relative thereto, manuallycontrolled power operated means for reciprocating said rod to cause theexhaust pipe to carry the form into the truss rings and carry the thrustplate against the ends of the stave supported on the form and thenretracting the thrust plate, the form and said rod, said means causingthe retraction of the thrust plate slightly before the retraction of theform.

12. In a tub setting up machine, a pair of racks, each adapted tocontain a series of truss rings, each rack being approximatetion intoand out of said openings in the sides of the racks whereby to carry aseries of staves into the truss rings and then with draw the formtherefrom, and means acting upon a withdrawal of the form toautomatically release the assembled tub to permit the discharge of thenext pair of rings downward in said racks and stop said rings when theyare in register with the openings in the sides of the racks.

13. In a tub setting up machine, a pair of truss ring racks supporting apair of truss rings in alinement, a stave supporting form reciprocatableinto and out of said racks and the truss rings supported'therein, andmeans for reciprocating said form, including a shaft, means thereon forconverting the rotary movement of the shaft into reciprocating movementof the form, a gear loose on the shaft, and operat1vely connected to asource of power, a manually actuatable clutch operatively engaging thegear with the shaft, or disengaging it therefrom, a continuously actingbrake on the shaft, and means for automatically releasing said clutchwhen the shaft has made one complete revolution.

In testimony whereof we hereunto afiix our signatures.

RAYMOND L. HINES. 7 JOHN A. BLUM. PAUL L. BLUM.

